Tus ua haujlwm ua haujlwm ntawm ntub dej yog mas ntub dej cov khoom siv los ntawm kev txo cov khoom siv-ua kua los yog nkag mus rau hauv nws qhov chaw. Tus ua haujlwm ua haujlwm ntawm ntub dej yog kom nce viscosity thiab wettabtly ntawm cov khoom ntawm cov khoom, ua rau cov khoom huab cua ntawm cov khoom sib txawv ntawm cov khoom. Tus neeg sawv cev, ntub dej tuaj yeem txo cov kev txhuam cov coefficient ntawm cov khoom, ua rau ntawm cov khoom ntawm cov khoom yooj yim rau swb; Nyob rau tib lub sijhawm, nws kuj tuaj yeem tiv thaiv kev puas tsuaj rau saum npoo ntawm cov khoom, tiv thaiv cov pa phem thiab hnav cov ntaub ntawv pabcuam ntawm cov khoom.
Lub ntsiab ntawm lub ntsiab ntawm wattersting tus neeg saib xyuas muaj ob pawg: Hydrophilic pab pawg thiab Lipophilic Group. Thaum tus neeg sawv cev ntub dej hu rau cov chaw nyob sab nraud, cov roj li hydrophilic txuas ntxiv mus rau hauv cov dej txuas ntxiv rau cov khoom sib txuas ntawm cov npoo av, yog li ua tiav ntub dej. Cov tshuaj tiv thaiv ntub dej tuaj yeem ua haujlwm cais raws li lub zog thiab xwm ntawm kev nqis tes ua. Raws li lub zog ntawm kev nqis tes ua, cov chaw ntub dej tuaj yeem muab faib ua kuab thiab surfactants nrog cov dej tsis muaj zog thiab tuaj yeem sib xyaw nrog dej; Raws li cov khoom lag luam, cov chaw ntub dej tuaj yeem faib ua anionic surfactants thiab cov tsis muaj semfactants.
In practical applications, the selection of wetting agents needs to consider their HLB value (hydrophile-lipophile balance) and the ability to reduce surface tension. The more the HLB value of the selected wetting agent matches the HLB value of the dispersed pigment and filler, the better the dispersion effect. For example, most inorganic pigments and fillers have a high HLB value (>13) Thiab yog cov xim hydrophricic pigments. Feem ntau, tsis yog lossis tsawg dua tus neeg sawv cev ntub tau ntxiv, vim tias muaj tus neeg sawv cev ntub dej yuav ua npuas dej ntxiv.